My point was the reference to water baptism in that chapter indicates water baptism was part of Paul's message.
The following concerns the scripture you use to justify your position that baptism is not a requirement for salvation:
"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:" Ephesians 2:8
Saved THROUGH faith. Meaning acting in faith to what God says brings the result He deems. "...Be baptized EVERYONE of you in the name of Jesus Christ for remission of sin..." (Acts 2:38) Having one's sin remitted is essential for salvation.
"Therefore we conclude that a man is justified by faith without the deeds of the law." Romans 3:28
Obedience to the NT command of water baptism in the name of Jesus is not part of the law. It is an act of faith.
"Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?
Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
5 For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection:
Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin." Romans 6:3-6
Notice Paul stresses a specific point in verse 5, IF we have been planted together in the likeness of Jesus' death we shall also be in the the likeness of His resurrection. As such, obedience to water baptism is essential for salvation.